109228788 has 18 divisors (see below), whose sum is σ = 276106194. Its totient is φ = 36409584.

The previous prime is 109228783. The next prime is 109228807. The reversal of 109228788 is 887822901.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 74442384 + 34786404 = 8628^2 + 5898^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109228781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1517031 + ... + 1517102.

It is an arithmetic number, because the mean of its divisors is an integer number (15339233).

Almost surely, 2^109228788 is an apocalyptic number.

109228788 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

109228788 is an abundant number, since it is smaller than the sum of its proper divisors (166877406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

109228788 is a wasteful number, since it uses less digits than its factorization.

109228788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3034143 (or 3034138 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 109228788 is about 10451.2577233556. The cubic root of 109228788 is about 478.0196008605.

The spelling of 109228788 in words is "one hundred nine million, two hundred twenty-eight thousand, seven hundred eighty-eight".